International & Multi-Language SEO Agency

Trusted by small business to large corporate organisation since 2008

4,5/5 Average customer rating.

Known from

Digital Advertising Agency

jef geeft seo tips

Sherlock SEO Agency is a direct response and performance marketing agency started by Jef Van Gool in 2008.

We are on a mission to turn data-driven insights into successful digital marketing campaigns. 

You need to work with Sherlock SEO Agency if the search 

Most of our days consists of managing lead generation campaigns across different channels such as Google Search, Google Display, Youtube, Facebook, Instagram or LinkedIn. We make sure your campaigns serve three goals (or we don’t run them). 

Sherlock office rules:

  • Everything you do is a test.
  • Only data proves you wrong
I suggest you get in a call with me so we can bounce off ideas, discuss your current obstacles and what you expect of us.

The first next step is checking your data (feel free to send us your NDA already, we also have a very good SLA should your legal department want to know).

Finally, we have a second conversation, in which we give both the good and the bad news.

What happens next? I’ll be happy to tell you during our next conversation.
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Online marketing services

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The Sherlock Way of Working


Most SEO agencies have a narrow view of search engine marketing that consists of three steps:

  1. Technical SEO
  2. On-page SEO
  3. Off-page SEO (linkbuilding)

Before we begin with your SEO Action Plan, Sherlock starts by converting your business goals into a digital strategy and measurement plan.Measure twice, cut once is our motto!

SEO is not just about rankings but about conversions and therefore sales.

We are the creators of the one and only SEO board game SEOPOLY ®. We would love to stop by for a strategy session or get started with the e-book yourself.


SEOPOLY® ebook Nederlandstalig 1.50 MB 112 downloads


SEOPOLY® ebook English 245.20 KB 47 downloads


How do you keep your competitors begging behind you in the search results for some leftovers?

A good conversation about your goals so we can build your SEO Action Plan. Customized to your organization and your needs.

Measure twice, cut once. We configure all your conversions, (marketing) pixels as needed, and use your data to justify any more marketing budget needed.

Full speed ahead. We create content, build landing pages and run ads. We continually improve this ongoing process based on the insights gained. This is how your brand comes alive online.

Online Marketing Services

Your website is more important today than ever before, and this will only increase. Do you lack the knowledge, expertise, or time to build (or expand) your website? Sherlock offers high-performance hosting with technical maintenance without worries for our customers. Sherlock is your webmaster who manages your website with knowledge of technology, marketing, and communication. What more could you want?

You know that Google is where your leads are going to inquire first. You also know that is not the place where your ideal customer will find you. Just like other Sherlock SEO clients, take maximum advantage of that most successful and lasting source of new customers. The search engine. Sherlock is your search engine optimization specialist. (Sherlock is also the right place for all your online advertisement needs). Ready to welcome new customers every day?

You understand that your website is a valuable investment, so you're looking for the best possible return. How do you build a new website that doubles in traffic and generates three times as many inquiries? Sherlock does it every day; read what other clients are saying here.

You want to sell more, and you know you need to tap into new markets. You probably already advertise online, and you know that scaling your advertising is a little more complex than you originally thought? Sherlock will steamroll you all the way to your best online marketing campaign ever. Together, we create impact with organic and paid campaigns.

You're looking for an online marketing consultant, SEO specialist, SEA specialist, Google Analytics expert, or a performance marketer? You may not know what you're looking for yet, or you want it all, but according to your budget, you need to make certain choices? You don't happen to know anyone who has some time right now? Sherlock offers professional consulting services with a no-nonsense approach. We are pleased to offer you the best online marketing consultants on the market.

Je snapt dat data het nieuwe goud is. Toch lijk je die 'golden nugget' maar niet te vinden. Sherlock haalt de belangrijkste inzichten uit jouw data. 🕵️‍♂️

De maandelijkse opvolging van je website, content, campagnes en resultaten zorgen voor blijvend succes. Maar het kost ook veel tijd en slapeloze nachten. Altijd maar bijblijven en ondertussen je onderneming draaiende houden. Sherlock SEO Agency helpt je uit de nood. We bieden geen standaard paketten gebaseerd op x_aantal zoektermen of x_aantal diensten. We starten altijd direct met testen en bouwen je auto terwijl we rijden. Interesse? contacteer ons!

Grafisch ontwerp, animaties, video of infographics? SEO copy en teksten, voor website, blog of social media? Er komt heel wat bij content marketing kijken. Sherlock zet jouw ideeën om in prachtige creaties met één doel voor ogen: performantie. Sommigen noemen het inbound marketing anderen content marketing, wij zeggen "SEO". Klaar voor organische groei met content?

SEO/SEA cursus? Een Google Analytics of WordPress opleiding? Het kan allemaal. En voor je het weet ben jij helemaal mee! Contacteer Sherlock SEO Agency voor een opleiding op maat.

Een succesvolle webshop kent vele uitdagingen. De dagdagelijkse marketing obstakels eigen aan e-commerce bedrijf vragen om een ervaren e-commerce specialist. Sherlock erkent en herkent deze uitdagingen. Profiteer van onze jarenlange e-commerce ervaring en haal meer uit je webshop.

What Customers Say About Sherlock SEO

“Sherlock werkte een professioneel plan van aanpak uit voor zowel onze website als SEO/SEA. Ik kan het Sherlock team iedereen aanraden!”

Manou Rottiers

Style at Home

“Experts in hun vakdomein. Een meerwaarde voor onze projecten. Sherlock SEO Agency is onze geprefereerde partner voor online zoekoptimalisatie!”

Frederik Picard


“Sherlock SEO Agency bestaat uit een team dat met je meedenkt en op een unieke manier je business-opportuniteiten blootlegt en ontplooit”

Emiel Denies


“De grondige kennis van de retailsector, een grensoverschrijdend team en professionele aanpak maakt dat wij heel graag met Sherlock samenwerken”

Robert Lipschütz


Since 2008, we have helped more than 170 small and large businesses
get more results and revenue from their website!

Some of our customers:

Digital custom Solutions